Inventor · disambiguated record
John F. Deffner
Also filed as: DEFFNER JOHN F
9 granted patents·724 citations·filing 1975–1986
92Inventor score
Top patents by PatentIndex Score
9 records- 0197US4685574AShelf-supported expandable gravity feed systemVISUAL MARKETING INC·Filed 1985·Granted Aug 11, 1987·290 cites·21 claims
- 0295US4598828AStorage and dispensing rackVISUAL MARKETING INC·Filed 1983·Granted Jul 8, 1986·127 cites·3 claims
- 0393US4105126AStorage and dispensing rackVISUAL MARKETING INC·Filed 1976·Granted Aug 8, 1978·100 cites·4 claims
- 0488US4035941AAudio-visual display deviceVISUAL MARKETING INC·Filed 1975·Granted Jul 19, 1977·53 cites·9 claims
- 0585US4785943AExpandable storage and dispensing systemVISUAL MARKETING INC·Filed 1986·Granted Nov 22, 1988·61 cites·10 claims
- 0683US4688684AVertical display systemVISUAL MARKETING INC·Filed 1986·Granted Aug 25, 1987·53 cites·16 claims
- 0758US4133648AOrganic synergists for organo-cerium (IV) anti-knock additives in lead-free fuel compositionsGULF RESEARCH DEVELOPMENT CO·Filed 1977·Granted Jan 9, 1979·13 cites·14 claims
- 0855US4113444AMicrobicide for use with hydrocarbon fuelsGULF RESEARCH DEVELOPMENT CO·Filed 1976·Granted Sep 12, 1978·4 cites·13 claims
- 0952US4615443ABeverage bottle package display systemVISUAL MARKETING INC·Filed 1985·Granted Oct 7, 1986·23 cites·12 claims
Join the waitlist — get patent alerts
Get an alert when John F. Deffner files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →